78106878558 has 16 divisors (see below), whose sum is σ = 173570841360. Its totient is φ = 26035626168.

The previous prime is 78106878557. The next prime is 78106878571. The reversal of 78106878558 is 85587860187.

78106878558 is a `hidden beast` number, since 7 + 8 + 1 + 0 + 6 + 8 + 78 + 558 = 666.

It is a super-2 number, since 2×78106878558² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78106878495 and 78106878504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78106878557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723211785 + ... + 723211892.

It is an arithmetic number, because the mean of its divisors is an integer number (10848177585).

Almost surely, 2^78106878558 is an apocalyptic number.

78106878558 is an abundant number, since it is smaller than the sum of its proper divisors (95463962802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78106878558 is a wasteful number, since it uses less digits than its factorization.

78106878558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446423688 (or 1446423682 counting only the distinct ones).

The product of its (nonzero) digits is 30105600, while the sum is 63.

The spelling of 78106878558 in words is "seventy-eight billion, one hundred six million, eight hundred seventy-eight thousand, five hundred fifty-eight".